Compact News: NOAA's National Weather Service SPC Tornado/Severe Thunderstorm Watches Update

Sunday, January 9, 2011

NOAA's National Weather Service SPC Tornado/Severe Thunderstorm Watches Update

SPC Severe Thunderstorm Watch 4
Sun, 09 Jan 2011 02:10:03 -0600

URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 4 NWS STORM PREDICTION CENTER NORMAN OK 210 AM CST SUN JAN 9 2011 THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF A SMALL PART OF SOUTH CENTRAL TEXAS AND THE MIDDLE TX COAST COASTAL WATERS EFFECTIVE THIS SUNDAY MORNING FROM 210 AM UNTIL 700 AM CST. HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 35 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES WEST SOUTHWEST OF ALICE TEXAS TO 65 MILES EAST NORTHEAST OF CORPUS CHRISTI TEXAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4). REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. DISCUSSION...AN ORGANIZED QLCS WILL MOVE EWD/ENEWD ACROSS S TX TO THE MIDDLE TX COAST IN ADVANCE OF AN EJECTING MIDLEVEL TROUGH AND ASSOCIATED SURFACE LOW. THE MAIN SEVERE THREAT CORRIDOR WILL BE ALONG THE WARM FRONT/INSTABILITY GRADIENT WHERE NEAR SURFACE-BASED INSTABILITY WILL COINCIDE WITH STRONG VERTICAL SHEAR. DAMAGING WINDS WITH BOWING SEGMENTS SHOULD BE THE MAIN THREAT...THOUGH AN ISOLATED TORNADO CANNOT BE RULED OUT WHERE STORMS INTERACT WITH THE WARM FRONT...WHICH WILL MOVE CLOSE TO CRP BEFORE THE CONVECTION REACHES THE COAST AROUND 11Z. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 25040. ...THOMPSON

SPC Severe Thunderstorm Watch 4 Status Reports
Sun, 09 Jan 2011 02:10:12 -0600

  STATUS FOR WATCH 0004 HAS NOT BEEN ISSUED YET

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